iLO DTV2794 Manual
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iLO DTV2794 Manual

27" mts stereo color televisions with digital tuner
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  • Page 2: Service Mode List

    SERVICE MODE LIST This unit is provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter to the SERVICE MODE function, press and hold both buttons simultaneously on the main unit or on the main unit and on the remote control for more than a standard time in the appropriate condition.

  • Page 3: Confirmation Of Initial Data

    WHEN REPLACING EEPROM (MEMORY) IC If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1. IN IT Table 1 CONFIRMATION OF INITIAL DATA Enter DATA SET mode by setting VOLUME to minimum.

  • Page 4: Servicing Fixtures And Tools

    SERVICING FIXTURES AND TOOLS JG176 2007 SD DTV Rom Disc JG205 JG206 Flash UP-Date Soft Disc Serial Communication Change JIG Ref. No. Part No. Parts Name Remarks Serial Communication Connect the set to personal computer JG205 APJG205000 Change JIG Up-Date of the Firmware JG206 APJG206000 Flash UP-Date Soft Disc...

  • Page 5: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS 1. ADJUSTMENT PROCEDURE FUNCTION FUNCTION OSD H CONT.CENT OSD C CONT.MAX circuits or replacing electrical parts or PCB assemblies. CUT OFF CONT.MIN H.POSI COL.CENT CAUTION H BLK L COL.MAX H BLK R COL.MIN • Use an isolation transformer when performing any service V.
  • Page 6 ELECTRICAL ADJUSTMENTS 2-5: BRIGHT CENT Receive the monoscope pattern. (RF Input) Set the screen mode to FULL. Using the remote control, set the brightness and contrast to normal position. Activate the adjustment mode display of Fig. 1-1 and press the channel button (29) on the remote control to select "BRI.
  • Page 7 ELECTRICAL ADJUSTMENTS 2-10: HORIZONTAL SIZE 2-14: TRAPEZIUM Receive the monoscope pattern. Receive the crosshatch signal from the Pattern Generator. Using the remote control, set the brightness and Using the remote control, set the brightness and contrast contrast to normal position. to normal position.
  • Page 8 ELECTRICAL ADJUSTMENTS 2-17: OSD POSITION 2-18: Confirmation of Fixed Value (Step No.) Receive the monoscope pattern from the Pattern Please check if the fixed values of each of the adjustment Generator. item is set correctly referring below. Using the remote control, set the brightness and ANALOG DIGITAL VIDEO1, VIDEO2...

  • Page 9: Purity And Convergence Adjustments

    ELECTRICAL ADJUSTMENTS 3-3: STATIC CONVERGENCE 3. PURITY AND CONVERGENCE ADJUSTMENTS NOTE Adjust after performing adjustments in section 3-2. NOTE Receive the crosshatch pattern from the color bar Turn the unit on and let it warm up for at least 30 generator.

  • Page 10: Electrical Adjustment Parts Location Guide (Wiring Connection)

    ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) CRT PCB TP024 R805 TP022 R803 J801 CP806 CP802B CP801B CP803 CD803 CD802 CD801 CP801A CP101 J702 J703 J704 J701 FB401 CP401 CD1001 TP003 SPEAKER W002 VR401 VR502 CP1001 CP802A DEGAUSS COIL L503 CP502...

  • Page 11: Micon Schematic Diagram

    MICON SCHEMATIC DIAGRAM P.CON+5V (TV MT PCB) CP101 A2001WR2-8P SCL1 BUFFER SDA1 Q104 IIC_OFF VIDEO_OUT KTA1504S_Y_RTK IIC_OFF C139 DTV_RX R142 DTV_RX VIDEO_AMP DTV_TX C109 DTV_TX C104 Q108 +3.3V_D KTC3875S +3.3V R140 Y_RTK RESET RESET 390K EEP ROM IC 8K IC R117 R116 TO AV SW/SOUND AMP/TONE CTL...
  • Page 12 CHROMA/IF SCHEMATIC DIAGRAM (TV MT PCB) FROM POWER W886 P.CON+5V_SW UN_REG.12V Q609 KTD1691Y P.CON+5V_SW C638 Q608 W817 KTC3209_Y R650 R659 UN_REG.12V R632 FROM/TO AV SW/SOUND AMP/TONE CTL R625 100 1/4W R623 Y_IN 100 1/4W U_IN V_IN Q604 VIDEO_IN1 C628 KTC3875S_ R641 Y_RTK VIDEO_IN2...

  • Page 13: Deflection Schematic Diagram

    DEFLECTION SCHEMATIC DIAGRAM (TV MT PCB) FROM/TO DY V.DRIVE IC IC401 LA7847-E V801 Pump up M68LWF088X50 CP401 A1561WV2-A6P L402_1 25.9 25.3 15.7 311015027 R407_1 R439 5.6K 1/4W +-1% P.CON+5V_B C425 0.0012 TO CRT/SVM CD803 CD807 CH823004 CH823004 (CP803) (CP807) R417 R414 R459 R444...

  • Page 14: Power Schematic Diagram

    POWER SCHEMATIC DIAGRAM (TV MT PCB) CP501 003P-2100 D516 RELAY DRIVE R515 Q504 CP509 10.9 1SS133 KTC3198 4.7K 1/4W 003P-2100 C516 0.001 TO AV SW/SOUND AMP/TONE CTL RY501 D505 W836 W855 ALKS321_M60 SOUND+B SR290-F R501 R541 P.CON+9V DEGAUSS COIL L503 CP502 T028R27021 0.22 1W...

  • Page 15: Tuner Schematic Diagram

    TUNER SCHEMATIC DIAGRAM (TV MT PCB) TU001 ENG36E03KF 31.4 C038 0.001 B C040 0.1 B TO CHROMA/IF C002 W850 6.3V A_TUNER_CVBS L001 22uH 0607 DTV_DATA SDA1 DTV_CLOCK W824 LEVEL CONVERT SCL1 Q006 2SK393800L LEVEL CONVERT Q005 2SK393800L FRON/TO MICON AFT_MAIN DTV_TX DTV_RX DEGI_ST_L...
  • Page 16 AV SW/SOUND AMP/TONE CTL SCHEMATIC DIAGRAM (TV MT PCB) YUV_IN(REAR) R1014 FROM/TO CHROMA/IF J704 5.6K MSP-213V1-652_NI_LF V_IN SOUND AMP IC IC1001 AN17822A U_IN R1015 VIDEO_IN3 P.CON+5V 5.6K Y_IN VIDEO_IN1 VIDEO_IN2 S_VIDEO_IN[Y] S_VIDEO_IN[C] AT+5V V_IN C1003 U_IN Y_IN C1001 FROM TUNER TUNER_AUDIO[R] TUNER_AUDIO[L] FROM/TO MICON...
  • Page 17 CRT / SVM SCHEMATIC DIAGRAM (CRT PCB) CRT BLOCK L801 150uH 0607 FROM DEFLECTION R802 CP801B 2.7K 1/4W R803 FROM DEFLECTION B2013H02-5P RED OUT RED OUT 180V Q804 C802 S801 Q801 100.6 15K 2W KTC4217 R812 KTC3199_Y 123.0 0.001 TP022 D810 C811 R817...
  • Page 18 POWER & GROUND SCHEMATIC DIAGRAM FROM/TO SDRAM (DIGITAL PCB) FROM/TO FLASH/GPIO FROM/TO VIF/SIF DTV_ASIC IC DTV_ASIC IC IC2401 ZR39740HGCF-B0 (1/6 POWER) IC2401 ZR39740HGCF-B0 (2/6 GND) FROM/TO AV IN/OUT VDD Bypass Cap Place cap near pin C2424 3V3_D ADAC_VDD MVDD VDD Bulk Bypass cap 0.1 B Place 1 cap per side of ZR740 ADAC_VSS...

  • Page 19: Sdram Schematic Diagram

    FROM/TO POWER & GROUND SDRAM SCHEMATIC DIAGRAM (DIGITAL PCB) FROM/TO FLASH/GPIO FROM/TO VIF/SIF FROM/TO AV IN/OUT DTV_ASIC IC IC2401 ZR39740HGCF-B0 (3/6 DDR) NR2404 NR2401 4D02WGJ0150TCE 4D02WGJ0150TCE DDRWEN SWEN SDATA3 DDRDQ15 SWEN SDATA3 DDRRASN SRASN SDATA5 DDRDQ14 SRASN SDATA5 DDRBS1 SBS1 SDATA7 DDRDQ13 SBS1...
  • Page 20 FROM/TO POWER & GROUND FLASH/GPIO SCHEMATIC DIAGRAM (DIGITAL PCB) FROM/TO SDRAM FROM/TO VIF/SIF DTV_ASIC FROM/TO AV IN/OUT IC2401 ZR39740HGCF-B0 (4/6 FLASH/GPIO) JG2425 (SPI_HOLD) GPIO_03 NR2408 4D02WGJ0470TCE SPI_SO SD card update SPI_CLK SPI_CSN JG2445 C2472 CLKIN SPI_SI 18P CH SPI_WEN SPI_FLASH IC JG2409 3V3_D IC2405 EN25P16-50HCP...
  • Page 21 FROM/TO POWER & GROUND VIF/SIF SCHEMATIC DIAGRAM (DIGITAL PCB) FROM/TO SDRAM FROM/TO FLASH/GPIO FROM/TO AV IN/OUT DTV_ASIC IC IC2401 ZR39740HGCF-B0 (5/6 VIF/SIF) R2445 C2476 IF_P IFE_AIN_P 0.01 B R2446 C2477 IF_N IFE_AIN_N 0.01 B R2448 IF_AGC IF_AGC 2K +-1% JG2418 RF_AGC JG2419 AGC_SENSE...
  • Page 22 FROM/TO POWER & GROUND AV IN/OUT SCHEMATIC DIAGRAM (DIGITAL PCB) FROM/TO SDRAM Spurious filter FROM/TO FLASH/GPIO Place circuit near CP2403 DTV_ASIC B2407 IC2401 ZR39740HGCF-B0 (6/6 AV I/O) SD_H/SEL_SW FROM/TO VIF/SIF FCM1608KF-102T02 VDAC_COMP PIXOUT7 B2406 IF_AGC PIXOUT6 FCM1608KF-102T02 PIXOUT5 PIXOUT4 L2421_1 PB_OUT VDAC_U PIXOUT3...

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